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- /*
- * Copyright 2016 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "include/core/SkCanvas.h"
- #include "include/core/SkString.h"
- #include "samplecode/Sample.h"
- #if SK_SUPPORT_GPU
- # include "include/gpu/GrContext.h"
- #else
- class GrContext;
- #endif
- //////////////////////////////////////////////////////////////////////////////
- void Sample::setSize(SkScalar width, SkScalar height) {
- width = SkMaxScalar(0, width);
- height = SkMaxScalar(0, height);
- if (fWidth != width || fHeight != height)
- {
- fWidth = width;
- fHeight = height;
- this->onSizeChange();
- }
- }
- void Sample::draw(SkCanvas* canvas) {
- if (fWidth && fHeight) {
- SkRect r;
- r.set(0, 0, fWidth, fHeight);
- if (canvas->quickReject(r)) {
- return;
- }
- SkAutoCanvasRestore as(canvas, true);
- int sc = canvas->save();
- if (!fHaveCalledOnceBeforeDraw) {
- fHaveCalledOnceBeforeDraw = true;
- this->onOnceBeforeDraw();
- }
- this->onDrawBackground(canvas);
- SkAutoCanvasRestore acr(canvas, true);
- this->onDrawContent(canvas);
- #if SK_SUPPORT_GPU
- // Ensure the GrContext doesn't combine GrDrawOps across draw loops.
- if (GrContext* context = canvas->getGrContext()) {
- context->flush();
- }
- #endif
- canvas->restoreToCount(sc);
- }
- }
- ////////////////////////////////////////////////////////////////////////////
- bool Sample::mouse(SkPoint point, InputState clickState, ModifierKey modifierKeys) {
- switch (clickState) {
- case InputState::kDown:
- fClick = nullptr;
- if (point.x() < 0 || point.y() < 0 || point.x() >= fWidth || point.y() >= fHeight) {
- return false;
- }
- fClick.reset(this->onFindClickHandler(point.x(), point.y(), modifierKeys));
- if (!fClick) {
- return false;
- }
- fClick->fPrev = fClick->fCurr = fClick->fOrig = point;
- fClick->fState = InputState::kDown;
- fClick->fModifierKeys = modifierKeys;
- this->onClick(fClick.get());
- return true;
- case InputState::kMove:
- if (fClick) {
- fClick->fPrev = fClick->fCurr;
- fClick->fCurr = point;
- fClick->fState = InputState::kMove;
- fClick->fModifierKeys = modifierKeys;
- return this->onClick(fClick.get());
- }
- return false;
- case InputState::kUp:
- if (fClick) {
- fClick->fPrev = fClick->fCurr;
- fClick->fCurr = point;
- fClick->fState = InputState::kUp;
- fClick->fModifierKeys = modifierKeys;
- bool result = this->onClick(fClick.get());
- fClick = nullptr;
- return result;
- }
- return false;
- }
- SkASSERT(false);
- return false;
- }
- //////////////////////////////////////////////////////////////////////
- void Sample::onSizeChange() {}
- Sample::Click* Sample::onFindClickHandler(SkScalar x, SkScalar y, ModifierKey modi) {
- return nullptr;
- }
- bool Sample::onClick(Click*) {
- return false;
- }
- void Sample::onDrawBackground(SkCanvas* canvas) {
- canvas->drawColor(fBGColor);
- }
- // need to explicitly declare this, or we get some weird infinite loop llist
- template SampleRegistry* SampleRegistry::gHead;
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